The Sda 6000 Central Control Unit - Loewe Q2500B Serviceanleitung

Technology of Q 2500 colour TV set
poses cannot be replaced by one from a nor-
mal TV set.

4.1.3 The SDA 6000 central control unit

CVBS1
Slicer1
CVBS1
Slicer2
16...21
External
Interface
16
In the Q 2500 chassis the processor must fulfil
the following functions:
- Oscillator for generation of the CPU cycle
frequency.
- Generation of the clock frequency for the
bus systems.
Document Q 2500
ACQ
I-Cache
16
Boot
Rom
Bus
16
D-Cache
16
XRAM
2 KByte
GA
SRU
4-
Channel
D-Synch
ADC
7-bit
FIFO
3 x 6 Bit
DAC
Port 5
3
6
H V
A Siemens SDA 6000 is used in the Q 2500
chassis for control of device functions. This 16
bit processor is a development of the C 166
family of single chip CMOS microcontrollers. It
combines excellent CPU characteristics of up
to 8 million computation operations per sec-
ond with high functionality, flexibility and high
capacity input and output ports. The SAD
6000 has 5 Ports (Port 2 – Port 6) with a total
of 44 inputs and outputs. It was designed es-
pecially for applications, where cost plays a
critical role. This makes the processor suitable
for use in colour TV sets.
32
Instr./Data
CPU-Core
C166
16
Interrupt Controller
X-Bus
Instr./Data
36 nodes (8 ext.)
GPT1
GPT2
T2
SPI
USART
T5
I2C-Bus
SSC T3
ASC
T6
T4
Port 3 Port 2 Port 4
8
15
- Processing of the RSIG signals and local
operation commands.
- Generation of the I²C bus systems for con-
trol of the HF/IF units, processing of pic-
tures, video text, PIP and audio, for com-
munication with the memory IC, the SAT
receiver unit and the interface selection.
66
SDA 6000
Data
16
Internal
RAM
Data
16
2 Kbyte
Data
PEC
OSC
XTAL
(6 MHz)
OCDS
RTC Watchdog
JTAG
Port 6
4
8
7
© Loewe ProCollege